Dyeing process and mechanism



April 29, 1930. R. c. RAHM DYEING PROCESS AND MECHANISM 2 SheetsSheet 1 Filed March 24, 1928 will Roam EA L RAHM,

gwuentoz April 29, 1930. R. c. RAHM DYEING PROCESS AND MECHANISM 2 Sheets-Sheet 2 Filed March 24, 1928 ROBERT EARL RAH'M,

gwoenfop u en STATES Patented Apr. 29, 1939 PATENT OFFICE RGBERT CARL RAHM, 0F WYOMISSING, PENNSYLVANIA, ASSIGNGR- TO BERKS ENGL NEERING COMPANY, -INC., OF READING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA DYEING PROCESS AND MECHANISM:

Application filedMai'eh 24, 1928. Serial No. 264,298.

Fig. 1 is mainly'a longitudinal section on the line 11 of Fig. 2.

Fig. 2 is a cross-sectional view on the line 22 of Fig. 1, looking in the direction of the arrow;- the charged receptacles being inclicated in different positions of revolution, and the crank connections of the controlling member being indicated by dotted lines.

Fig. 3 is a cross-sectional view on the line 33 of Fig. 1 showing clearly the eccentrio-ally mounted crank-connecting member.-

In the dyeing of fine textile articles particularly, such as silk hosiery, I have found that the agitation and tangling action commonly incident to dyeing operations, is detrimental to the quality of the finished goods; and the main purpose of my invention is to avoid such detrimental effect while insuring satisfactory uniform dyeing in an economically effective wa-y. In order to realize this general object I have conceived it to be important that the required uniform circula- 7 tion of the dyeing liquor through the fabrics be effected without subjecting the latter to such agitating action as will seriously disturb their original placement inthe perforated receptacle ordinarily employed; and I have succeeded in carrying out this improved method by simply and economically operated means, as fully set forth with required reference to the drawings. 1

The drawing indicates a suitable liquor vatlO, in which the goods are to be immersed with required movements for securing uniform circulation of the liquor therethrough. Each of the four fabric receptacles 11 is shown as an ordinary perforated-Wall cylinder havingopposit-e heads 12, 12 provided with trunnioning-axle projections 13, 13 which provide pivotal suspension means; these projections being mounted in a corresponding circular series of bearings 14L provided in rotary rece1 )tacle-carrying frames 15 fixed to a horizontally mounted driving axle 16, whereby the receptacles are jointly revolved about this axis 16. I

As shown the trunnioning projections 13 of each cylinder are preferably located eccentrically so as to cause the diametral line 20 of the freely suspended receptacle to naturally assume a vertical position when the receptacleis dipped into or withdrawn from the vat liquor in its revolution about the axis of rotation 16; which tendency is assisted by the positioning of the normal centre of gravity ofthe contained goods in this diametral line 20 as indicated at 21.

The swinging of the circular series of suspended receptacles 11 about the axis of rotation thus carries each of the latter, with its charge of fabrics, through the vat liquor, first downwardly, then in a curved horizontal direction. and finally upwardly in withdraw ing them from the liquor; with a reverse swing above the liquor preliminary to repetition of such dipping and withdrawing movement.

To enable the carrying into effect of my improved method, as more fully described later, it is requisite that the vertical diametral line 20 of each receptacle,- -which line passes through the normal center of gravity 21 of the contained goods,be practically maintained in such vertical position, with all of said diametral lines extending in substantially parallel planes, during the swinging of the receptacles through the liquor; which relation will not be at all maintained if the receptacles are left free to swing upon their individual axes of suspension 13, owing to the dragging'action through the liquor to which they are subjectedin revolving around the common axis of rotation 16.

Such positive maintenance of the normal diametral lines 20 in substantially vertical parallel planes, during the joint revolutions of the receptacles about the axis of rotation 16, is very simply secured, as shown, by means of a controlling member 25, which is con- LOG nected to a series of vertical crank arms 26 on the suspension axles of the respective receptacles, and is itself carried on an eccentrically fixed mounting 28 on the machine; the eccentricity of said mounting relative to the'axis of rotationl6, corresponding with the length of the crank arms 26 so that the latter and the corresponding diametral lines will be positively maintained in the vertical positions illustrated.

In continuouslycarrying on my improved nethod of dyeing by means of the simple mechanism set forth, I partially load each of the receptacles 11 as indicated, and-then rotate the carrier-frame shaft 16 so as to suecessively move eachloaded receptacle through the liquor at each revolution of said shaft;

I first, with a downward dipping movement;

second, with a horizontal swing; andthird with an upward withdrawing movement; a final arcuate swing above the liquor bringing the receptacle to position for repetition of these movements through the liquor. 7 Each receptacle is conveniently charged when in raised position, through a suitably closed charging and emptying opening 30, the articles being naturally placed in the lower portlon thereofas desired for elfective circulation oft-he liquor therethrough, with unoc-- cup'ied space above as indicated. As each receptacle is dipped into the liquorand swung therethro-ugh with its diametral line 20 positively maintained in vertical position, the

whole charge tends first to float towards-the tcp'of the receptacle withoutentangling disarrangement of the articles, and then to similarly descend to the bottom during the Withdrawing move1nent,with more or less of a squeezing action in each case; the goods compacting and draining during their swing above the llquor preliminary to repetition of.

1. The improved method dyeing which.

consists in partially loading a perforate d-wall receptacle, and then repeatedly subjecting the contained goods to successive dipping, horizontal lymov1ng, and withdrawmgaction n a dyeing bath with positive mamtenance in parallel vertical lines of the diametral plane which passes through the normal center of gravity of the contained goods. i

2. In combination with a dyeing vat, a per- 3. In combination with a vat, areceptaclecarrying frame rotatably mounted therein, apertured-wall receptacles suspended from said rotary frame 7 so as to be successively dipped into and withdrawn from the vat liquid, and means for positively maintaining in parallel vertical lines the diametral planes which pass through the normal centers of gravity of the contained goods.

4:. v In combination with a vat, a receptaclecarrying frame rotatably mounted therein, .and acircular series of suspended aperturedwall receptacles each rotatably mounted upon an a-xis of suspension and all revolvable jointly about the frame axis so as to be successivelydipped intoand withdrawn from-the vat liquid; each of said receptacles, during its revolution about the'frame axis, having the diametral planes which 'ass through the normal center of gravity 0 its contained goods, positively maintained in parallel vertical lines. v 7

' 5. In combination with a vat, a'receptacle' v carrying, frame rotatably mounted therein, and a circular series of suspended aperturedwall receptacles each eccentrically mounted upon an axis of suspension and allrevolvable jointly about the frame axis so as to be successively dipped into and withdrawn from the vat'liquid; each of said receptacles, during its revolution aboutthe frame axis, having the diametral planes which pass through the normal center of gravity of its contained goods, positively maintained in parallel vertical lines.

' 6. In combination with a vat, a receptaclecarrying frame rotatably mounted therein, jointly revolvable aperturedwall receptacles each having a suspension axle provided with a crank arm, and a connecting member for the latter havinga fixed mounting correspondingly eccentric to the carrying frame axis whereby like diametral planes ofsaid receptacles are positively maintained in parallelism during revolution of the receptacles about the frame axis. r

v In testimony whereof I affix mysignature. ROBERT CARL RAIIM.

forated-wall receptacle revolvably mounted therein to swing about a fixed axis into and out of the dyeing liquid, the diametral plane which passes through the normal center of gravity of the .containedgoods being positivej lymaintained in parallell'ines during succes-v sive revolutions of the receptacle.

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